Not quite. The 1.9L Mi16 came in two versions, DFW (9.5:1) and D6C (10.4:1). The D6C was indeed designed to run on leaded 97 and didn't have a knock sensor at all. At the time, 98 didn't exist.
Diesel vs Premium Diesel
- Thread starter BlindFreddie
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The Megane i rescued must have had 91 in it from previous owners... Its average urban consumption was through the roof and the idle a little rough. Mind you, the fuel being well over a year old probably didnt help...
But it ran just fine on it, the ecu pulling timing etc so there was no knocking. Ran it until the light came on and gave it some fresh 95 and there was not a massive change in performance but the fuel consumption came right back down!
Have tried 98 a few times in these, made zero difference. Same with the Giulietta with its very highly strung turbo 1.4, it is happy enough on 98 but no change in performance or economy from 95. So it just gets 95 from whatever servo happens to pop up after the light comes on...
I think the moral of this thread is - dont overthink it. Use what's recommended on the fuel door!
But it ran just fine on it, the ecu pulling timing etc so there was no knocking. Ran it until the light came on and gave it some fresh 95 and there was not a massive change in performance but the fuel consumption came right back down!
Have tried 98 a few times in these, made zero difference. Same with the Giulietta with its very highly strung turbo 1.4, it is happy enough on 98 but no change in performance or economy from 95. So it just gets 95 from whatever servo happens to pop up after the light comes on...
I think the moral of this thread is - dont overthink it. Use what's recommended on the fuel door!
That was the model SAAB I had. It made 230bhp at the front wheels when I finished playing with it. Any more required a change to a larger turbocharger and then apparently the 5 speed box's strength becomes it's Achilles heel.You had a Saab turbo? Man you need to try one of these suckers .... You'll love it!!
Too Good To Ignore: Saab 900 T16 Vs Citroen Cx 25 Gti Turbo | CCFS UK
< All Blogs Citroen and Saab's form for left-field car design meant the turbo models were oddball choices when new, but are great modern classics..www.classiccarsforsale.co.uk
I've still got the supercharged 3 wheel Reliant to get some thrills in.
Mmmmm, and he could have a drive of the Reliant, he'd love it.
DoubleChevron
Real cars have hydraulics
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Fellow Frogger
Mmmmm, and he could have a drive of the Reliant, he'd love it.
There is crazies that fiddle with CX's too.....
CGAT ... well known. Neil is a member here. Its currently running twin injectors and nitrous I think. I've never touched mine, you can only wind up the boost a small amount before the factory clutch will slip. The rest of the driveline is very robust though
(unless your running lots of injectors and boost ... and nitrous 
).Mine would be down on power compared to most, I'm thinking hte old turbo on it needs a new core, its still goes extremely well, but I'm sure that 38 year old turbo isn't putting out the boost it once did
seeya,
Shane L.
In that instance the "premium" fuel would be going to both the "truck" diesel pump in the truck area and the "premium" labelled pump in the car area. On the basis that they were delivering what they promised in the car area and a "better" fuel than promised in the truck area, I thought it was low risk.
I have heard of 91 tanks at servos being filled with 95 if they were short on 91 that day.
That is feasible but the stories about diluting the higher octane tanks with lower less costly fuels seems to be better based and make more sense as that would increase profit.
91 seems to be the fuel that the industry quotes in media releases when 95 RON is probably the most used and recommended fuel for modern vehicles. Therefore more likely to be subject to subtle adjustment by profiteers.98 seems to make a difference in smoother running of older vehicles that rebreath the vapours in the fuel tank (like our old trusty Fuego's) addition of aromatic additives may enhance that effect.
Observant owners will of course note all those factors in making their own choice of fuel.
Ken.
Carburettor cars are a different kettle of fish…That is feasible but the stories about diluting the higher octane tanks with lower less costly fuels seems to be better based and make more sense as that would increase profit.
98 seems to make a difference in smoother running of older vehicles that rebreath the vapours in the fuel tank (like our old trusty Fuego's) addition of aromatic additives may enhance that effect.
Observant owners will of course note all those factors in making their own choice of fuel.
Ken.